A d.c. supply of 120 V is connected to a large resistance X. A voltmeter of resistance 10 k2 placed in series in the circuit reads 4 V. What is the value of X ? What do you think is the purpose in using a voltmeter, instead of an ammeter, to determine the large resistance X?
A d.c. supply of 120 V is connected to a large resistance X. A voltmeter of resistance 10 k2 placed in series in the circuit reads 4 V. What is the value of X ? What do you think is the purpose in using a voltmeter, instead of an ammeter, to determine the large resistance X?
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter29: Direct Current (dc) Circuits
Section: Chapter Questions
Problem 19PQ
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